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Branch and link instruction arm >> DOWNLOAD
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5Home > ARM and Thumb Instructions > BL 10.21 BL Branch with Link. label, and copies the address of the next instruction into LR (R14, the link register).
Some ARM processor versions support the “IT” instruction that allows up to 4 instructions to be Branch exchange (BX) and Branch link exchange (BLX).
Branch with link, and exchange instruction set. BXJ. Branch, and change to Jazelle execution.
Joseph Yiu, in The Definitive Guide to the ARM Cortex-M3 (Second Edition), 2009 To call a function, the branch and link instructions should be used. BL labelMar 3, 2012 –
Oct 24, 2003 –
In assembly, a function is essentially a set of instructions that we can branch to, run BL does a branch and sets register r14, also known as the link register lr to the instruction to switch from 32-bit arm instructions to 16-bit thumb instructions,
A B (Branch) is a jump, and is roughly equivalent to the JMP instruction on A BL (Branch with Link) is a jump that additionally writes a return address to Thus, for example, if you were to encounter an ARM assembly BNE instruction like this: